M68HC11 Absolute Assembler   Version 2.70C:LAB5.ASC


   1 A      0100                 ORG       $0100                 ;       START PROGRAM AT 0100 
   2 A 0100 8600       REP       LDAA      #$00                  ;       LOAD ACCUMULATOR A WITH HEX NUMBER 00 
   3 A 0102 B71004               STAA      $1004                 ;       WRITE CONTENTS OF A TO PORT B, TURNS ON LED 
   4 A 0105 CE0002               LDX       #$02                  ;       LOAD INDEX REGISTER X WITH 02 (REG IS 16 BIT) 
   5 A 0108 09         HIGH      DEX                             ;       DECREMENT INDEX REGISTER X BY 1 
   6 A 0109 26FD                 BNE       HIGH                  ;       IF REG X IS NOT =0, GO TO HIGH 
   7 A                  
   8 A 010B 86FF                 LDAA      #$FF                  ;       LOAD ACCUMULATOR A WITH HEX NUMBER FF 
   9 A 010D B71004               STAA      $1004                 ;       SAME AS ABOVE EXCEPT THIS WILL TURN OFF LED 
  10 A 0110 CE0002               LDX       #$02                  ;       LOAD INDEX REGISTER X WITH 02 
  11 A 0113 09         LOW       DEX                             ;       DECREMENT INDEX REGISTER X BY 1 
  12 A 0114 26FD                 BNE       LOW                   ;       IF REG X IS NOT =0, GO TO LOW 
  13 A 0116 7E0100               JMP       REP                   ;       JUMP TO REP, REPEATING THE LOOP 
  14 A                           END                             

SYMBOL TABLE:  Total Entries=    3

HIGH                0108    REP                 0100
LOW                 0113    

Total errors: 0